NEW ORLEANS — A performer who was part of Kendrick Lamar’s Super Bowl halftime show was detained by security after waving the Sudanese flag and Palestinian flag together with the words “Sudan” and “Gaza” written on them toward the end of the performance, the NFL said.

Pulitzer-Prize and Grammy winning rapper Kendrick Lamar was the headlining halftime performer at Super Bowl 59 in New Orleans on Sunday. Lamar was joined in the performance by frequent collaborator SZA.

Former world No. 1 tennis player Serena Williams made a surprise cameo in rapper Kendrick Lamar’s Super Bowl halftime show, showcasing the popular crip walk.